Little about Mohammad Youssuf Abdulazeez — identified by the FBI as the gunman who killed four Marines at two facilities in Tennessee on Thursday — indicates a motive. Here is what we know about him so far.

The U.S. military plans to practice live fire training at Pagan island in Micronesia, which is home to many plants and animals found no where else in the world. It’s just one of many gorgeous islands where the U.S. has practiced war.